<?php
class subpages {
	
	private $each_disNums; //ÿҳ��ʾ����Ŀ��
	private $nums; //����Ŀ��
	private $current_page; //��ǰ��ѡ�е�ҳ
	private $sub_pages; //ÿ����ʾ��ҳ��
	private $pageNums; //��ҳ��
	private $page_array = array (); //���������ҳ������
	private $subPage_link; //ÿ����ҳ������
	private $subPage_type; //��ʾ��ҳ������
	/*
   __construct��SubPages�Ĺ��캯�������ڴ������ʱ���Զ�����.
   @$each_disNums   ÿҳ��ʾ����Ŀ��
   @nums     ����Ŀ��
   @current_num     ��ǰ��ѡ�е�ҳ
   @sub_pages       ÿ����ʾ��ҳ��
   @subPage_link    ÿ����ҳ������
   @subPage_type    ��ʾ��ҳ������
  
   ��@subPage_type=1��ʱ��Ϊ��ͨ��ҳģʽ
         example��   ��4523����¼,ÿҳ��ʾ10��,��ǰ��1/453ҳ [��ҳ] [��ҳ] [��ҳ] [βҳ]
         ��@subPage_type=2��ʱ��Ϊ�����ҳ��ʽ
         example��   ��ǰ��1/453ҳ [��ҳ] [��ҳ] 1 2 3 4 5 6 7 8 9 10 [��ҳ] [βҳ]
   */
	function construct($each_disNums, $nums, $current_page, $sub_pages, $subPage_link, $subPage_type) {
		if ($each_disNums && $nums && $current_page && $sub_pages && $subPage_link && $subPage_type) {
			$this->each_disNums = intval ( $each_disNums );
			$this->nums = intval ( $nums );
			if (! $current_page) {
				$this->current_page = 1;
			} else {
				$this->current_page = intval ( $current_page );
			}
			$this->sub_pages = intval ( $sub_pages );
			$this->pageNums = ceil ( $nums / $each_disNums );
			$this->subPage_link = $subPage_link;
			$this->show_SubPages ( $subPage_type );
		
		//echo $this->pageNums."--".$this->sub_pages;
		}
	
	}
	
	/*
    __destruct���������಻��ʹ�õ�ʱ����ã��ú��������ͷ���Դ��
   */
	function __destruct() {
		unset ( $each_disNums );
		unset ( $nums );
		unset ( $current_page );
		unset ( $sub_pages );
		unset ( $pageNums );
		unset ( $page_array );
		unset ( $subPage_link );
		unset ( $subPage_type );
	}
	
	/*
    show_SubPages�������ڹ��캯�����档���������ж���ʾʲô���ӵķ�ҳ  
   */
	function show_SubPages($subPage_type) {
		if ($subPage_type == 1) {
			$this->subPageCss1 ();
		} elseif ($subPage_type == 2) {
			$this->subPageCss2 ();
		}
	}
	
	/*
    ����������ҳ�������ʼ���ĺ���
   */
	function initArray() {
		for($i = 0; $i < $this->sub_pages; $i ++) {
			$this->page_array [$i] = $i;
		}
		return $this->page_array;
	}
	
	/*
    construct_num_Page�ú���ʹ����������ʾ����Ŀ
    ��ʹ��[1][2][3][4][5][6][7][8][9][10]
   */
	function construct_num_Page() {
		if ($this->pageNums < $this->sub_pages) {
			$current_array = array ();
			for($i = 0; $i < $this->pageNums; $i ++) {
				$current_array [$i] = $i + 1;
			}
		} else {
			$current_array = $this->initArray ();
			if ($this->current_page <= 3) {
				for($i = 0; $i < count ( $current_array ); $i ++) {
					$current_array [$i] = $i + 1;
				}
			} elseif ($this->current_page <= $this->pageNums && $this->current_page > $this->pageNums - $this->sub_pages + 1) {
				for($i = 0; $i < count ( $current_array ); $i ++) {
					$current_array [$i] = ($this->pageNums) - ($this->sub_pages) + 1 + $i;
				}
			} else {
				for($i = 0; $i < count ( $current_array ); $i ++) {
					$current_array [$i] = $this->current_page - 2 + $i;
				}
			}
		}
		
		return $current_array;
	}
	
	/*
   ������ͨģʽ�ķ�ҳ
   ��4523����¼,ÿҳ��ʾ10��,��ǰ��1/453ҳ [��ҳ] [��ҳ] [��ҳ] [βҳ]
   */
	function subPageCss1() {
		$subPageCss1Str = "";
		$subPageCss1Str .= "��" . $this->nums . "����¼��";
		$subPageCss1Str .= "ÿҳ��ʾ" . $this->each_disNums . "����";
		$subPageCss1Str .= "��ǰ��" . $this->current_page . "/" . $this->pageNums . "ҳ ";
		if ($this->current_page > 1) {
			$firstPageUrl = $this->subPage_link . "1";
			$prewPageUrl = $this->subPage_link . ($this->current_page - 1);
			$subPageCss1Str .= "<a href='$firstPageUrl'>��ҳ</a>";
			$subPageCss1Str .= "<a href='$prewPageUrl'>��һҳ</a>";
		} else {
			$subPageCss1Str .= "��ҳ";
			$subPageCss1Str .= "��һҳ";
		}
		
		if ($this->current_page < $this->pageNums) {
			$lastPageUrl = $this->subPage_link . $this->pageNums;
			$nextPageUrl = $this->subPage_link . ($this->current_page + 1);
			$subPageCss1Str .= " <a href='$nextPageUrl'>��һҳ</a>";
			$subPageCss1Str .= "<a href='$lastPageUrl'>βҳ</a>";
		} else {
			$subPageCss1Str .= "��һҳ";
			$subPageCss1Str .= "βҳ";
		}
		
		echo $subPageCss1Str;
	
	}
	
	/*
   ���쾭��ģʽ�ķ�ҳ
   ��ǰ��1/453ҳ [��ҳ] [��ҳ] 1 2 3 4 5 6 7 8 9 10 [��ҳ] [βҳ]
   */
	function subPageCss2() {
		$subPageCss2Str = "";
		$subPageCss2Str .= "��ǰ��" . $this->current_page . "/" . $this->pageNums . "ҳ ";
		
		if ($this->current_page > 1) {
			$firstPageUrl = $this->subPage_link . "1";
			$prewPageUrl = $this->subPage_link . ($this->current_page - 1);
			$subPageCss2Str .= "<a href='$firstPageUrl'>��ҳ</a>";
			$subPageCss2Str .= "<a href='$prewPageUrl'>��һҳ</a>";
		} else {
			$subPageCss2Str .= "��ҳ";
			$subPageCss2Str .= "��һҳ";
		}
		
		$a = $this->construct_num_Page ();
		for($i = 0; $i < count ( $a ); $i ++) {
			$s = $a [$i];
			if ($s == $this->current_page) {
				$subPageCss2Str .= "<span style='color:red;font-weight:bold;'>" . $s . "</span>";
			} else {
				$url = $this->subPage_link . $s;
				$subPageCss2Str .= "<a href='$url'>" . $s . "</a>";
			}
		}
		
		if ($this->current_page < $this->pageNums) {
			$lastPageUrl = $this->subPage_link . $this->pageNums;
			$nextPageUrl = $this->subPage_link . ($this->current_page + 1);
			$subPageCss2Str .= " <a href='$nextPageUrl'>��һҳ</a>";
			$subPageCss2Str .= "<a href='$lastPageUrl'>βҳ</a>";
		} else {
			$subPageCss2Str .= "��һҳ";
			$subPageCss2Str .= "βҳ";
		}
		echo $subPageCss2Str;
	}
}